Build an application to set the view in the iOS operating system
14 minute(s) read
Aug 11, 2021
In fact, iOS is the operating system that runs all the programs and applications of different types of hardware and devices made by Apple. This operating system is actually derived from operating system X, and more advanced operating system X has become iOS over time.
The number of users of this operating system or hardware that has this operating system is increasing, so it is the best opportunity for programmers and developers to design and sell different types of applications on the iOS platform and operating system. Apple has created a virtual store called the App Store where people can buy all the programs and applications they need, or there is an opportunity for application developers and programmers who can use different types of applications. Design them and sell them in this virtual App Store.
Apple App Developers
If you want to work as an application developer for Apple applications , you must have a unique Apple ID for yourself. Having an Apple ID is essential for Apple to work as an application developer.
If you have an Apple ID and sign in to your Apple account, you will be able to do the following:
- You can use Apple-specific tools in designing and developing different types of applications.
- You can participate in global video conferencing between all app developers.
- You can join the iOS app development team.
How to create an account and get an Apple ID?
Follow the steps below to get your custom Apple ID.
1- Click on the link https://developer.apple.com/programs/register/.
2- After clicking on the link and entering the window, click the Create Apple ID button.
3- Enter the information he wants from you.
4- Activate the account via your email.
5- Once you have completed the account creation process and entered all the required information, you can use Apple's special and advanced tools that are used to develop applications.
Some of the tools that can be used to develop applications include Xcode, which also has an IOS simulator and IOS SDK.
Join iOS developer program
The reason developers join the App Developers Association is that Apple seeks to provide high quality apps to its users. If developers do not become members of the App Developers Association, they may offer low-quality, malicious applications to users. That's why developers need to be members of the community so that quality apps are provided to users by the community's developers, not by all developers.
Benefits of joining the Apple App Developers Association:
- After designing and building the application, it is possible to test it in the real environment of the iOS operating system .
- It is possible to easily upload and sell the app in the Apple Virtual Store after building and designing the app by joining the Apple App Developers Association.
- It is possible to easily see the result and output of the application you have designed as a preview, and you can easily access the developer previews.
Here's how to join the Apple App Developer Association:
1- Log in to the Apple site or click the link
2- After entering this window, click on the Enroll Now button.
3- At this stage, if you already have an Apple account, you can log in with your previous account by clicking on sign in. But if you do not have an account, you need to create a new account and get a unique Apple ID.
4- After passing this step, you must specify your user accounts. There are two types of accounts: Individual and Company
A type of account that includes a large number of application developers and is like a group that includes a large number of developers. This type of account is best when several developers want to join.
This is an individual account type and it is not possible to add a large number of developers. An application developer can join this type of account.
5- New users should enter their personal information and use the credit card to buy and activate the account.
6- After purchasing and activating the account, in order to be able to access specialized tools for developing Apple applications or developer resources, you must click on the member center option.
In the member center page that opens, you can do the following:
- You can manage the development team and existing devices for development.
- You can manage the applications in the virtual app store through iTunes Connect.
- You can get technical help and guidance from members of the App Development Association.
Install Xcode desktop
1- Download the latest version of Xcode via the link
2- Double click on the Xcode dmg file.
3- After double clicking on that file, an installation device will open.
4- Then a window will open and show you two items. Xcode application item and application folder shortcut address.
5- Drag and drop the Xcode into the app. After that, Xcode will be placed in the application folder.
6- Now Xcode is like other applications on the system and can be used.
Another way to download, install and set up Xcode is to download it from the Mac App store and install it according to the steps shown and the step-by-step guide.
Interface builder tool
Interface builder is a tool that is easily used to design user interfaces. This tool has a set of UI elements that can be used to design user interfaces. In order to be able to use the ready-made elements for this tool, all you have to do is use the mouse to drag the desired element and drop it on the main UI view page. In this way, you can use the ready-made elements in the Interface builder tool and design an easy user interface. You can select the ready-made elements in this tool through the object library at the bottom right of the page and drag them into the page. It should be noted that the extension of the user interface files is in the form of xibs and using this extension you can save the user interface files and use them later.
It is good to know that the IOS emulator software for both iPhone and iPad devices works in two separate versions, is the version that the emulator software works for the iPad device with the version that this software for the device iPhone works differently.
The iPhone version includes the following:
- iPhone (normal)
- iPhone Retina
- iPhone 5
The iPad version includes the following:
- iPad Retina
Using IOS operating system simulation software, you can simulate and view some items such as physical coordinates, location and location. Features such as memory warning and in-call status can also be simulated using the device simulator software. In other words, it can be said that all items and features and options can be simulated using emulator software. Items that cannot be simulated by the simulator software are accelerometers.
Write the first simple application for iOS
In this part of the tutorial, we want to design a simple application whose output and result we want to see on the simulator. It should be noted that this application that we want to design has a simple view.
The steps for designing and building an application for IOS are as follows:
1- Launch the Xcode desktop and programming environment.
2- Click on the Create a new Xcode project option.
3- Select Single View Application.
4- A window will open in which you must enter the necessary information about the project. It is better to enter the relevant and requested information in the fields. For example, in the Product name field, the project name and product must be entered.
5- You must note that you have enabled the Use Automatic Reference Counting option. It is very important that this option is enabled.
6- By activating this option, you will cause all the resources allocated to them to be released after the objects are out of scope. This means that the task of managing and checking memory and other resources is transferred to the compiler itself instead of to the programmer, and the compiler does all this.
7- After activating the special option to do things by the compiler automatically, you must specify the location of the project and files and then press the create button.
8- Then, you will be faced with a page where you can easily change the view and the direction of the image and the page and change it from landscape to portrait or vice versa.
9- In the deployment target section, select the operating system, which is the lowest level of the operating system. You want the application you are writing to be launched on higher operating systems. So in this section you specify the operating system that is the lowest and lowest level and you want to run your application on higher operating systems.
10- Then next to the Run button, there is a drop-down menu, open it and select the desired iPhone simulator software from within that menu.
11- In this case, we successfully finished our first empty application in iOS. The output of the program will be very simple and will not have any user interface or text or image. We just designed the basis of a simple application.
12- In order to make some small and appearance changes, we can also change the background color. Select the ViewController.xib file. We actually want the background color to change for this file, which is why we chose this file. Then, on the view box on the right side of the page, select the background option, select the color you want, and then run the program.
It should be noted that by default deploy target is set to IOS 6.0 and auto-layout is enabled.
To be able to disable auto-layout, you need to disable all auto-layout checkboxes in the file inspector section of each xib file.
You must go to the inspector selector bar to access File inspector.
We have to create 5 files for the application we are creating.
The files required to design the first IOS application are as follows:
The code that should be included in the AppDelegate.h file is as follows:
// Header File that provides all UI related items.
// Forward declaration (Used when class will be defined / imported in future)
// Interface for Appdelegate
@interface AppDelegate: UIResponder
// Property window
@property (strong, nonatomic) UIWindow * window;
// Property Viewcontroller
@property (strong, nonatomic) ViewController * viewController;
// this marks end of interface
- AppDelegate inherits from UIResponder. The job of the UIResponder is to manage events.
- UIApplicationDelegate is implemented by delegate methods. These methods are used to present the main events of the application such as about to terminate and finished launching.
The UIWindow object is used to manage and synchronize different types of page views. In other words, it can be said that this object is a view on which other views are based.
flow management is done by UIViewController and is responsible for managing and reviewing it.
The code that should be included in the AppDelegate.m file is as follows:
// Imports the class Appdelegate's interface
// Imports the viewcontroller to be loaded
// Class definition starts here
// Method to intimate us that the application launched successfully
- (BOOL) application: (UIApplication *) application
didFinishLaunchingWithOptions: (NSDictionary *) launchOptions
self. window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self. viewController = [[ViewController alloc]
initWithNibName: @ "ViewController" bundle: nil];
self. window. rootViewController = self. view Controller;
[self. window makeKeyAndVisible];
- (void) applicationWillResignActive: (UIApplication *) application
/ * Use this method to release shared resources, save user data,
invalidate timers, and store enough application state information
to restore your application to its current state in case it is
terminated later. If your application supports background execution, this method is called instead of
applicationWillTerminate: when the user quits.
- (void) applicationWillEnterForeground: (UIApplication *) application
/ * Called as part of the transition from the background to the
inactive state. Here you can undo many of the changes made on
entering the background. * /
- (void) applicationDidBecomeActive: (UIApplication *) application
/ * Restart any tasks that were paused (or not yet started) while
the application was inactive. If the application was previously in
the background, optionally refresh the user interface. * /
- (void) applicationWillTerminate: (UIApplication *) application
/ * Called when the application is about to terminate. Save data if
appropriate. See also applicationDidEnterBackground: * /
- (void) applicationWillTerminate: (UIApplication *) application
/ * Called when the application is about to terminate. Save data if appropriate.
See also applicationDidEnterBackground: * /
- All UIApplication Delegates are defined here.
- The space required on the screen to display a view controller is provided by the UIVIEWCONTROLLER.
The makeKeyAndVisible method is used to display the window.
The code that should be included in the ViewController.h file is as follows:
// Interface for class ViewController
@interface ViewController: UIViewController
The ViewController class inherits from the UIViewController class. UIViewController provides the infrastructure needed to manage application views.
The code that should be included in the ViewController.m file is as follows:
// Category, an extension of ViewController class
@interface ViewController ()
- (void) viewDidLoad
// Do any additional setup after loading the view, typically from a nib.
- (void) didReceiveMemoryWarning
// Dispose of any resources that can be recreated.
- There are two methods implemented in this file based on UIViewController. This class provides the infrastructure needed to manage application views.
- Settings and initial values related to the view are done in viewDidLoad.
The didReceiveMemoryWarning method is called when the memory shortage warning and memory warning appear.About our Android and iOS app development services